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Frighteningly Ambitious Startup Ideas — One of the more surprising things I've noticed while working on Y Combinator is how frightening the most ambitious startup ideas are. In this essay I'm going to demonstrate this phenomenon by describing some. Any one of them could make you a billionaire.

Loopt's Sam Altman on Why He Sold to Green Dot for $43.4M — Mobile location start-up Loopt will be acquired by the banking company Green Dot, best-known for its prepaid cards. — The deal is worth $43.4 million in cash, though that includes $9.8 million set aside in retention payments for key Loopt employees.

Transfer of Wikipedia sites from GoDaddy complete — After months of deliberation and a complicated transfer, the Wikimedia Foundation domain portfolio has been successfully transferred from GoDaddy to MarkMonitor. The portfolio transfer was formally completed on Friday, March 9th, 2012.

5 Minutes on The Verge: Techmeme's Gabe Rivera — Gabe Rivera is the founder and editor of tech news aggregator Techmeme, which he started in 2005 as a one man operation, and which now has a staff of 10 people who also help to run its sister site, Mediagazer.

Army Warns Of Danger Of Geotagging — While for an ordinary civilian the automatic geotagging of your photos or check-ins might be convenient, in the military it can be a lethal mistake. In 2007, geotagged photos of a new fleet of helicopters allowed enemy forces to mortar the base …

Intel aims for faster Thunderbolt with PCI-Express 3.0 — Intel is working to boost data transfer speeds with a faster pipe on Thunderbolt, a high-speed connector technology that link computers with peripherals, the company said on Thursday. — Intel is working to boost data transfer speeds …

From signed up to satisfied — Getting new users is easy; keeping them is hard. Join Intercom co-founder Des Traynor as he explains how to bridge the gap between a company's initial traction and sustained success.